map is:exact -package:text -package:Cabal-syntax -package:dlist -package:foldl -package:case-insensitive -package:base-compat-batteries -package:hedgehog -package:ghc -package:containers -package:amazonka-core -package:imports -package:monoidal-containers package:basement
Map all element a from a block to a new block of b
Map all elements in a list